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US 4,972,170 AGranted
High speed fuse
AssigneeCooper Industries, Inc.
InventorsArlie H. Ehlmann, Ronald E. Mollet, Fred Levko
Life of this patent
Estimating the term…
Abstract
The high speed fuse employs stamped end bell and terminals rather than forged or machined parts. A slot for the terminal is punched through the end bell. The terminal is inserted into the slot in the end bell and staked in position. This insures a strong tight fit without requiring welding or soldering. One end of each terminal has coined ridges to facilitate automatic welding of the fuse link to the terminals. Round balls are used to seal the fill holes for the arc quenching material. Metal pins secure the end bells within the fuse housing but are not electrically connected to the terminals because of the insulative end bells.
Claims24
A fuse comprising;
- a first end bell having a first terminal;
- a second end bell having a second terminal;
- a fuse element electrically connecting said first and second terminals;
- a housing receiving said end bells, terminals and fuse element;
- said first end bell having at least one aperture with a circular cross-section therethrough;
- a spherical solid ball having a cross-section greater than said cross-section of said aperture for insertion into said aperture, said ball self-centering as said ball is inserted into said aperture and frictionally held within said aperture;
- said housing having a plurality of circumferentially spaced holes in each end of said housing;
- said first and second end bells having a plurality of bores circumferentially spaced around the periphery thereof adapted for alignment with said holes;
- said first and second end bells being made of a non-electrically conductive material;
- and
- metal pins received within said aligned holes and bores for securing said end bells within said housing, said pins in non-electrical contact with said terminals and fuse element.
8 more elements
A fuse comprising:
- a first end bell having an opening therethrough;
- a first terminal having an inner end extending through said opening and projecting from said first end bell;
- said inner end having weld projections;
- a second end bell having a second terminal;
- a fuse element having one end welded to said weld projections on said first terminal and another end welded to said second terminal;
- a housing receiving said end bells, terminals and fuse element;
- said first end bell having at least one aperture with a circular cross-section therethrough;
- and
- a spherical solid ball having a cross-section greater than said cross-section of said aperture for insertion into said aperture, said ball self-centering as said ball is inserted into said aperture and frictionally held within said aperture.
6 more elements
A fuse comprising:
- a first end bell having an opening therethrough;
- a first terminal having an inner end extending through said opening and projecting from said first end bell;
- said inner end being staked to attach said first terminal to said first end bell;
- a second end bell having a second terminal;
- a fuse element electrically connecting said first and second terminals;
- a housing receiving said end bells, terminals and fuse element;
- said first end bell having at least one aperture with a circular cross-section therethrough;
- and
- a spherical solid ball having a cross-section greater than said cross-section of said aperture for insertion into said aperture, said ball self-centering as said ball is inserted into said aperture and frictionally held within said aperture.
6 more elements
A fuse comprising:
- a first end bell having an opening therethrough;
- a first terminal having an inner end extending through said opening and projecting from said first end bell;
- said inner end having weld projections;
- a second end bell having a second terminal;
- a fuse element having one end welded to said weld projections on said first terminal and another end welded to said second terminal;
- a housing receiving said end bells, terminals, and fuse element;
- said housing having a plurality of circumferentially spaced holes in each end of said housing;
- said first and second end bells having a plurality of bores circumferentially spaced around the periphery thereof adapted for alignment with said holes;
- said first and second end bells being made of a non-electrically conductive material;
- and
- metal pins received within said aligned holes and bores for securing said end bells within said housing, said pins in non-electrical contact with said terminals and fuse element.
8 more elements
A fuse comprising:
- a first end bell having an opening therethrough;
- a first terminal having an inner end extending through said opening and projecting from said first end bell;
- said inner end being staked to attach said first terminal to said first end bell;
- a second end bell having a second terminal;
- a fuse element electrically connecting said first and second terminals;
- a housing receiving said end bells, terminals and fuse element;
- said housing having a plurality of circumferentially spaced holes in each end of said housing;
- said first and second end bells having a plurality of bores circumferentially spaced around the periphery thereof adapted for alignment with said holes;
- said first and second end bells being made of a non-electrically conductive material;
- and
- metal pins received within said aligned holes and bores for securing said end bells within said housing, said pins in non-electrical contact with said terminals and fuse element.
8 more elements
A fuse comprising:
- a first end bell having an opening therethrough;
- a first terminal having an inner end extending through said opening and projecting from said first end bell;
- said inner end being staked to attach said first terminal to said first end bell;
- said inner end having weld projections;
- a second end bell having a second terminal;
- a fuse element having one end welded to said weld projections on said first terminal and another end welded to said second terminal;
- and
- a housing receiving said end bells, terminals, and fuse element.
5 more elements
A fuse comprising:
- a first end bell having an opening therethrough;
- a first terminal having an inner end extending through said opening and projecting from said first end bell;
- said inner end being staked to attach said first terminal to said first end bell and having weld projections;
- a second end bell having a second terminal;
- a fuse element having one end welded to said weld projections on said first terminal and another end welded to said second terminal;
- a housing receiving said end bells, terminals and fuse elements;
- said first end bell having at least one aperture with a circular cross-section therethrough;
- a spherical solid ball having a cross-section greater than said cross-section of said aperture for insertion into said aperture, said ball self-centering as said ball is inserted into said aperture and frictionally held within said aperture;
- said housing having a plurality of circumferentially spaced holes in each end of said housing;
- said first and second end bells having a plurality of bores circumferentially spaced around the periphery thereof adapted for alignment with said holes;
- said first and second end bells being made of a non-electrically conductive material;
- and
- metal pins received within said aligned holes and bores for securing said end bells within said housing, said pins in non-electrical contact with said terminals and fuse element.
10 more elements
Dependencies are inferred from the claim text.